I'm hoping thats 1.09 volts, as (as far as i know) since the i-generation, the memory voltage is linked to the cpu voltage, and ddr3 tends to die above 1.6 volts

Again, I've not been OC-ing for quite a while, so things might have changed since.

Still, anything above 1.5v would be ill-advised on modern cpus unless you use extreme cooling methods (LN2 anyone? )